Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Summarizing the experience with hydraulic shock dampers on Phantom I and Phantom II models. | ||
| View original record | To R. From Hs/Ra. c. to Er. c. to Da. c. to Ev. EP. ORIGINAL 1235. HYDRAULIC SHOCK DAMPER. In view of the fact that these are in process of re-design, we think it may be useful to summarise our… | ||
| Scan002 | Analysis of suspension and shock damper issues, particularly concerning noise, efficiency, and component deflection. | ||
| View original record | -2- enormously in the last few years are average speed and road surfaces, the latter particularly now giving us waves or undulations instead of pot-holes and so requiring different treatment. (b) The… | ||
| Scan003 | Hydraulic damper performance, high-speed road holding, and maintenance issues. | ||
| View original record | -3- Hs/Sa.1/AL.2.12.30.Contd. hydraulic load of 60 lbs. + 10 to 15 lbs. Hartford load than we do from the standard 60 lbs. hydraulic load. (b) High Speed Road Holding & Steering. Here again we find… | ||
| Scan004 | The performance and proposed modifications for dampers, valves, and related components. | ||
| View original record | -4- He/31.1/AL.2.12.30.Contd. in such a case would appear to be to allow sufficient capacity above the oil level in the atmospheric chamber to take care of oil so expelled. This chamber would also… | ||
| Scan005 | Damper performance, valve accessibility, and load measurements for various car models. | ||
| View original record | -5- securing the rear dampers "spring" quite appreciably. We are taking exact measurement but the movement is clearly visible when the damper is running under normal loads. There have been some… | ||
| Scan006 | Series of diagrams showing the progressive falling off in rear damper efficiency with reduction of stroke. | ||
| View original record | FIG. 1. P. II REAR DAMPER LOADS 80/85 OVAL LEVER USED. DIAGRAMS SHOW PROGRESSIVE FALLING OFF IN DAMPER EFFICIENCY WITH REDUCTION OF STROKE. Low Pressure Diagrams High Pressure Diagrams A 154 LBS / D"… | ||
| Scan007 | Blank document with a Print Room date stamp from Derby. | ||
| View original record | ROLLS-ROYCE LTD PRINT ROOM 4 DEC 1930 DERBY | ||
| Scan008 | Graphs showing the effect of restricting air vent ball lift on a Phantom II rear shock damper. | ||
| View original record | P. II. REAR SHOCK DAMPER. 450 R.P.M. 1" STROKE. AIR VENTS .025 DIA. OIL TEMP. 25°C. LOADS 80/85. Top-left graph: AIR VENT BALLS. H.P. & L.P. LIFT .010 H.P. STROKE. 154 LBS/D" FIG. I. Top-right graph:… | ||
| Scan009 | Reverse side of a document showing a purple ink stamp from the print room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 3 DEC 1930 DERBY | ||
| Scan010 | Graph and diagram illustrating tests on different rear shock damper levers. | ||
| View original record | S.S. REAR SHOCK DAMPER LEVER TESTS. LEVER USED FOR INDICATOR DIAGRAMS. FISH-BACKED SECTION. PRESENT STANDARD LEVER F.80336/7. STRAIGHT-SIDED SECTION. DEFLECTION - INS. .250 .200 .150 .100 .050 LOAD ON… | ||
| Scan011 | Faint, largely illegible carbon copy of a document with a purple ink stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 3 DEC 1930 DERBY. [Main body text is too faint and illegible to be transcribed] | ||
| Scan012 | The laboratory testing of two different sequence starter main switch units, comparing different thicknesses of copper contact laminations. | ||
| View original record | R. from EFC. c. Sg. c. By. c. Wor. ORIGINAL EFC3/AD2.12.30. X.7655. SEQUENCE STARTER MAIN SWITCH UNIT TO LeC.2804. Two of these units have been made and duly tested in our experimental laboratory… | ||
| Scan013 | 'F' cylinder liner tests designed to reduce distortion, seizure, and cracked blocks. | ||
| View original record | ORIGINAL To R. From Hs/ACL. c. Sg. Hork c. 3S Ry. E. c. TS Rg. Da. Hs/ACL.1/MJ.4.12.30. X38661 "F" CYLINDER LINER TESTS. We carried out a test with three modified forms of liner on the "F" engine the… | ||
| Scan014 | Test summary comparing different cylinder liner schemes and the effects of honing on distortion. | ||
| View original record | -2- Hs/ACL/AL.L.1/AL.4.11.30.Contd. quite good and a decided improvement over the standard liners which were run in three other bores for comparison. There appeared little difference between the… | ||
| Scan015 | Two experiments with beneficial results on the 'flywheel period' vibrations on a 25-HP engine. | ||
| View original record | To R. From Hs/GR. c. to Ss. WOR. c. to Ds. E. c. to By. ORIGINAL Hs/GR.1/MJ.8.12.30. X634. VIBRATIONS ON 25-HP. Continuing our report Hs/GR/MJ.21.11.30. we have done two experiments with beneficial… | ||
| Scan016 | 'F' cylinder tests, detailing various cylinder liner modifications and their results. | ||
| View original record | To R. From HS/ACL. c. Sg. c. Wor. Rg. c. HV. E. ORIGINAL HS/ACL1/ADS.12.30. X3866. "F" CYLINDER TESTS We have just completed a two hours running test of various cylinder liner modifications with… | ||
| Scan017 | Engine tests comparing different piston ring configurations and their effects on oil consumption and block distortion. | ||
| View original record | Hs/ACLL/ADS.12.30 contd. -2- used only the plain scraper ring at the top and the oil consumption on this test amounted to only 5 1/2 pts/hour. Half the number of pistons were standard, however. There… | ||
| Scan018 | Modification to the P.2. starter's auxiliary switch by removing the carbon contacts. | ||
| View original record | ORIGINAL R. from EFC. c. Sg. c. Ry. Wor. EFCL/ADL1.12.30. X.6048. AUXILIARY SWITCH OF P.2. STARTER X.7655. SWITCH UNIT WITHOUT CARBON CONTACTS. We have observed that on the present standard P.2.… | ||
| Scan019 | Proposal for a two-rate charge switching scheme using a special switchbox for one-way interconnection. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. E. c. Da. RV. EFC2/AD12.12.30. X.6016. TWO-RATE CHARGE SWITCHING SCHEME. SPECIAL SWITCHBOX FOR ONE-WAY INTERCONNECTION. Further to the first two paragraphs of our… | ||
| Scan020 | Continued report on the interconnection of lighting switches and dynamo charging. | ||
| View original record | EFC1/ADL2.12.30 contd. -2- whereas at present it is taken to contacts on the right-hand switch. The main field connection is taken to contacts on both right and left-hand switches. It will be seen… | ||
| Scan021 | Discovery of cracks in a connecting rod from a compression ignition engine. | ||
| View original record | ORIGINAL To Rg. From Hs/CHP. c. for Mr. Tweedie. Hs/CHP.1/MJ.13.12.30. Y-H-53 COMPRESSION IGNITION ENGINE. Connecting Rod Failure. We enclose herewith a sketch shewing the extent of the cracks… | ||
| Scan022 | Sketch illustrating cracks in a connecting rod from a C.I. Unit. | ||
| View original record | V1002. SCALE 1/1. SKETCH ILLUSTRATING CRACKS IN CONN. ROD (C.I. UNIT). WHP 10-12-30 | ||
| Scan023 | Blank page with a purple 'Print Room, Derby' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 13 DEC 1930 DERBY. | ||
| Scan024 | Rating tests and interchangeability for full and moderate supercharged 'H' engines. | ||
| View original record | To R. c. to Sg. Wor. Rg. c. to E. By. c. to Mr. Jaques. A.I.D. X4453. Hs/RHD.1/MB.15.12.30. FULL AND MODERATE SUPERCHARGED "H" ENGINES RATING TESTS AND INTERCHANGEABILITY. We have been requested by… | ||
| Scan025 | Comparison table of engine data for different rotor diameters and supercharger types. | ||
| View original record | - 2 - | Engine Data. | 10.25" Diameter Rotor. | 9.5" Diameter Rotor. | Existing Standard | |---|---|---|---|---|---|---| | | "H" F.S. | "H" F.S. | "H" M.S. | "H" F.S. | "H" M.S. | "H". M.S. | | Comp… | ||
| Scan026 | Supercharger performance, comparing different engine models, gear ratios, and rotor diameters. | ||
| View original record | -3- Reviewing these figures we are of the opinion that the best full supercharger "H" performance is obtained with the 8.8/1 gear ratio and 10.25" diameter rotor (Col.1.) the corresponding M.S. engine… | ||
| Scan027 | Engine specifications and proposed modifications for 'F' and 'H' type engines, focusing on camshafts and superchargers. | ||
| View original record | - 4 - "R" type cams E.33096. 2.95" diameter chokes. Magnetos toggling 1° at full throttle. 8.8/1 supercharger gears. 10.25" supercharger rotor. Throttles 68° movement. The corresponding "F" MS. engine… | ||
| Scan028 | 'F' cylinder tests focusing on oil consumption. | ||
| View original record | To R. from Hs/ACL. ORIGINAL. c. Sg. c. Wor. E. c. Rg. EV. Hs/ACL1/AD16.12.30. x3866. "F" CYLINDER TESTS - OIL CONSUMPTION. In our last report on "F" cylinders (see Hs/ACL/AD6.12.30) we summarised the… | ||
| Scan029 | Oil consumption tests related to cylinder liner distortion and piston scraper ring configurations. | ||
| View original record | -2- We have previously mentioned that we get appreciable variation in oil consumption on our standard engines and have suggested that this may arise through liner distortion. Consequently it has been… | ||
| Scan030 | The endurance testing of a sequence starter main switch and the performance of its copper laminated contact brush. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. c. E. Ry. ORIGINAL EFC5/ADL6.12.30. X.7655. SEQUENCE STARTER MAIN SWITCH TO LeC.2804. Further to our EFC3/AD2.12.30. the endurance test therein mentioned has now been… | ||
| Scan031 | Report outlining impressions from the Paris Aero Show, focusing on aircraft design, engines, and aerodynamic performance. | ||
| View original record | To R. From Hs/ACL. c.c. to SG. WOR. c.c. to RG. BY. c.c. to E. Lr. K2064 THE PARIS AERO SHOW. In reporting my impressions of the Paris Aero Show I have described in the following the points which… | ||
| Scan032 | Analysis of various aircraft designs and engine performance, page 2. | ||
| View original record | -2- HS/ACL.1/MJ.30.12.30 Contd. 15% of the total drag it would appear that there was little attempt to save in this respect. On the other hand there was a marked tendency with the large passenger… | ||
| Scan033 | Analysis of various aircraft, including the Spad 21 and Amiot 140M, with a detailed focus on Lamblin radiators. | ||
| View original record | -3- Hs/ACL.1/MJ.20.12.30.Contd. similar to the Dewoitine are employed and two fixed Lamblin radiators are provided under the short lower wing. These radiators are not provided with shutters but employ… | ||
| Scan034 | Various aircraft radiator and air intake designs. | ||
| View original record | -4- at the front edge and flows out at the rear edge. When operated as retractible radiators the front edge swings about the front water pipe, glands being provided to form the water joint, and the… | ||
| Scan035 | Carburetter intake, exhaust systems, and oil radiators. | ||
| View original record | -5- Hs/ACL.1/AL.20.12.30.Contd. This sleeve was connected to the carburetters intake by a vertical pipe which also continued down to the power part of the cowling forming another intake which was… | ||
| Scan036 | Hispano engine mountings and a detailed analysis of the Bristol 'Mercury' engine. | ||
| View original record | -6- Engine Mounting. The Hispano engine is carried by a flange formed by the top half of the crankcase and extending the whole length of the engine. In the Breguet Bomber the engine was bolted to a… | ||
| Scan037 | Lorraine, Isotta, and Hispano aero engines, and a new supercharger design. | ||
| View original record | -7- HS/ACL.1/MJ.20.12.30.Contd. Lorraine. The latest Lorraine engines have an alum. cylinder block with wet liners. The liners are screwed into the cylinder head and the base of them bolted to the… | ||
| Scan038 | New flame damper design and observations from a visit to the Hispano-Suiza factory. | ||
| View original record | -8- FLAME DAMPERS for Induction Systems. I examined a new form of flame damper which has been tested by Hispanos and the French 'Jupiter'. It consists of a number of alum. plates drilled with conical… | ||
| Scan039 | Hispano cylinder construction, detailing their nitriding process, materials, and design features. | ||
| View original record | -9- Hispano Cylinder Construction. The Hispano liners are all nitro hardened and a really excellent job. They say they passed through a lot of trouble with the nitriding of cylinders due to distortion… | ||
| Scan040 | Observations on Hispano-Suiza engine design, manufacturing techniques, and car production. | ||
| View original record | -10- HS/ACL.1/ML.20.12.30.Contd. Hispano pistons are not forgings but die cast. They nitro harden a great number of their parts including crankshafts and camshafts. They claim excellent results in… | ||
| Scan041 | Hispano-Solex carburettor air silencer design and performance, with recommendations for experiments on the Phantom ll. | ||
| View original record | (11) up in an ingious way. They use a small bronze bridge piece bolted at the top and bottom of the alum bridge piece to form a bracing bar. The crankcase is recessed to receive this part. See sketch.… | ||
| Scan042 | Visit to the 'Nichromic' works in Asnieres to evaluate their alloy for use in car exhaust manifolds. | ||
| View original record | (12) VISIT TO "NICHROMIC" WORKS. I visited the works of "Nichromic" at Asnieres where they manufacture an alloy of that name used extensively in France for making boxes for cementation and carburising… | ||
| Scan043 | Sketches of air intakes on French aircraft from the 1930 Paris Show. | ||
| View original record | AIR INTAKES. ON FRENCH AIRCRAFT. PARIS SHOW DEC.1930. 1 FORWARD FACING AIR SCOOPS TO EACH CARBURETTER ON DEWOITINE D27. SCOOP FORMED AS PART OF COWLING. FORWARD FACING AIR INTAKES ON BREGUET 27.A2.… | ||
| Scan044 | Blank page with a print room date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 23 DEC 1930 | ||
| Scan045 | Performance data and engine particulars for a Dewoitine D.27 aircraft with a Hispano-Suiza engine. | ||
| View original record | 2 DEWOITINE D.27. FITTED WITH 500 CV. HISPANO-SUIZA LANDING SPEED = 53.7 M.P.H. SPEED RANGE = 3.38 PRACTICAL CEILING = 30,400 FT. TOTAL WEIGHT = 2935 LBS. WING AREA = 188 sq FT. WING LOADING = 21.6… | ||
| Scan046 | Page showing three photographs of the French Dewoitine D.27 aircraft. | ||
| View original record | 2 AVIONS DEWOITINE Avion de Chasse D.27 Vue avant de l'Avion Dewoitine D. 27 Vue arrière de l'avion Dewoitine D. 27 à moteur Hispano-Suiza | ||
| Scan047 | Specifications for the Nieuport-Delage Type 82 C-1 aircraft. | ||
| View original record | L'Avion Nieuport-Delage Type 82 C-1. PARTICULARS OF THE NIEUPORT-DELAGE TYPE 82 C-1. Fitted with 500 HP. Lorraine Engine. Wing Area. 307 Sq. Ft. Speed at Ground Level. 175 M.P.H. Speed at 19,700 ft.… | ||
| Scan048 | Schematic of a hot air intake system for a Breguet long-distance aeroplane. | ||
| View original record | AIR INTAKES. PARIS SHOW DEC 1930. HOT AIR INTAKE ON BREGUET LONG DISTANCE AEROPLANE - "QUESTION MARK". PARIS - NEW YORK FLIGHT. DIRECTION OF AIR STREAM. EXH. MANIFOLD. HOT AIR INTAKE ROUND EXH.… | ||
| Scan049 | Blank page with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE PRINT ROOM 23 DEC 1930 DERBY. | ||
| Scan050 | Design drawing for an ejector type exhaust manifold and flame damper. | ||
| View original record | EXHAUST AIR FLOW BAFFLE ON UPPER HALF LOUVRES TYPE OF LOUVRES USED EJECTOR TYPE EXH. MANIFOLD AND FLAME DAMPER | ||
| Scan051 | Blank document page with a purple ink stamp in the bottom right corner. | ||
| View original record | ED 23 DEC 1930 DERBY. | ||
| Scan052 | Diagrams of a Lamblin radiator and a partly concealed honeycomb radiator on a Breguet 27A2 aeroplane. | ||
| View original record | [ "WATER RADIATORS.", "WATER INLET", "RADIATOR SWINGS ABOUT FRONT PIPE", "WATER OUTLET", "INDENTATIONS TO SEPARATE PLATES TO FORM WATER SPACE", "WATER SPACE", "LAMBLIN RADIATOR.", "RADIATOR SWINGS… | ||
| Scan053 | Blueprint detailing the liner construction for a Hispano-Suiza aero engine. | ||
| View original record | [ "HISPANO-SUIZA AERO ENG. LINER CONSTRUCTION", "7", "STIFFENING RIBS", "LINER ABOUT 50% THICKER THAN 'F' ENGINES", "SCREWED IN LINER TO HEAD", "TWO RECTANGULAR SECTION SOFT BLACK RUBBER RINGS.",… | ||
| Scan054 | Design for reinforcing bridge pieces on a Hispano-Suiza car engine cylinder block. | ||
| View original record | HISPANO SUIZA CAR ENG. REINFORCED BRIDGE PIECES OF CYL BLOCK METAL BETWEEN BORES ABOUT .200. THICK HELD BY TWO BOLTS BRONZE BARS BRIDGE PIECES REINFORCED BY BRONZE TIE BARS BOLTED ON EACH SIDE.… | ||
| Scan055 | Blueprint of the latest Lorraine cylinder construction design. | ||
| View original record | LORRAINE LATEST CYL CONSTRUCTION SCREWED IN AT HEAD SIMILAR TO HISPANO CYL BLOCK RUBBER GLAND RING STEEL PRESSER RING SCREW GLAND RING SERRATIONS FOR SPANNER RING SCREWED & WELDED TO CYL. LINER TO… | ||
| Scan056 | Blueprint of a 'Birmann' impeller for high-speed superchargers. | ||
| View original record | "BIRMANN" IMPELLER FOR SUPERCHARGERS FOR HIGH SPEED BACKFEED BLADES STRAIGHT CONICAL EDGES TO BLADES. ALTERNATE BLADES CUT AWAY AT ROOT TO GIVE FREE ENTRANCE TO GAS. WCH Dec 1930 | ||
| Scan057 | Graph showing the change in mean effective pressure as a function of the adiabatic efficiency of a supercharger. | ||
| View original record | CHANGE IN MEAN EFFECTIVE PRESSURE IN FUNCTION OF ADIABATIC EFFICIENCY OF SUPER CHARGER MULTIPLYING FACTORS FOR IND. M.E.P. OF ENGINE % ADIABATIC EFFICIENCY DISCHARGE PRESS. Curve Labels: 6" Hg, 9" Hg,… | ||
| Scan058 | Graph showing horsepower absorption versus adiabatic efficiency for a geared supercharger on an 1800 cubic inch engine. | ||
| View original record | HORSE POWER ABSORBTION OF GEARED SUPER CHARGER FOR 1800 CUB INCH ENGINE. BASED UPON: 30" BAROMETER 92% GEAR EFFICIENCY ΔP CARBURETTOR = 2" Hg T₁ = 500° F 1.45 LBS PER SEC. H.P. 140 120 100 80 60 40 20… | ||
| Scan059 | Blueprint of a flame trap (antiflamme) for a Hispano 500 C.V. engine. | ||
| View original record | ANTIFLAMME A.D.P.V. HISPANO 500 C.V. Bride s'adaptant au Carburateur alu 15/10 10 Diaphragmes alu Ceinture Duralumin 15/10 213 m/m 150 m/m 153 m/m SH | ||
| Scan060 | Blueprint for an A.D.P.V. flame arrestor, type Jupiter 420 C.V. | ||
| View original record | ANTIFLAMMES A. D. P. V. TYPE JUPITER 420 C.V. Fixation : 6 Boulons acier de 14 Φ longueur sous tete 145 m/m 8 Plaques d'aluminium Ep = 5 m/m Matiere : Aluminium Poids : 2 Kgs 150 Tolerances + 5% - 5%… | ||
| Scan061 | The reverse of a document showing a purple ink stamp from the Print Room in Derby. | ||
| View original record | PRINT ROOM, 23 DEC 1930 DERBY. LTD | ||
| Scan062 | The properties of a nickel-chromium alloy named Nichromic. | ||
| View original record | COPY. "N I C H R O M I C" Alloys having nickel and chromium as their basis have now been known a long time, but have only come into general use for industrial purposes during the last few years, owing… | ||
| Scan063 | The oxidation and acid resistance properties of NICHROMIC alloy. | ||
| View original record | - 2 - (b) - Resistance to oxidation.- This property is manifest not only when the alloy is in a hot state, but also in presence of acids. Articles made of NICHROMIC may be successively heated and… | ||
| Scan064 | Appliances used for the thermal treatment of metals. | ||
| View original record | APPLIANCES FOR THE THERMAL TREATMENT OF METALS. Boxes for malleable iron and cementation. - These accessories (necessary to all who reheat iron to decarburise it or who treat steel to recarburise it)… | ||
| Scan065 | The benefits of using NICHROMIC appliances for melting metals or salts. | ||
| View original record | COPY. APPLIANCES. CONTAINING MELTING METALS OR SALTS. Crucibles, troughs and ladles for testing purposes.- All Metallurgists, especially Founders, know the serious troubles connected with the use of… | ||
| Scan066 | Informational sheet on the properties and application of the NICHROMIC patented alloy in casting. | ||
| View original record | C O P Y. N I C H R O M I C. ALLIAGE BREVETE S.G.D.G. TEL. GALVANI 99.02 R.C. SEINE 210.540. ASNIERES, le................. (SEINE) 41 Rue Des Bas. NICHROMIC Gives strength to thin castings. The… | ||
| Scan067 | Notes explaining the advantages of a hyperboloid impeller as a centrifugal supercharger. | ||
| View original record | COPY. SOME NOTES EXPLAINING THE HYPERBOLOID IMPELLER AND ITS ADVANTAGES AS A CENTRIFUGAL SUPERCHARGER. (1) This impeller is specially designed for ultrahigh speed supercharger service and is not a… | ||
| Scan068 | Supercharger impeller design, materials, and performance in American aircraft engines. | ||
| View original record | - 2 - (8) The material of the vanes is not only stressed radically but tangentially as well making for unusual strength. The "composite design" (patent applied for) in which the centrifugal load… | ||
| Scan069 | The problems and considerations of high-speed impeller design for superchargers. | ||
| View original record | - 3 - on the problem of high speed impeller design has proven to me that this distortion in scale is not possible without a serious sacrifice of efficiency. In other words, it is not possible… | ||
| Scan070 | Analysis of the mechanical design and efficiency shortcomings of low and high-speed impellers, limiting supercharging development. | ||
| View original record | - 4 - This means that in an actual impeller a continuous equalisation of pressure must take place between the different flow lanes and consequently a bad disturbance is continuously created and… | ||
| Scan071 | Page discussing a new type of impeller design for high-speed requirements. | ||
| View original record | - 5 - and because they are inherent in the present design, an entirely new type of impeller, designed specially for high speed requirements, offers the only solution to the problem. | ||
| Scan072 | Compression ignition engine test, detailing run-in time and future work on rotational swirl. | ||
| View original record | ORIGINAL To R. From Hs/CHP. SS. Wor. RG. E. By. Lr. Mr. Tweedie. COMPRESSION IGNITION ENGINE. This engine is now rigged up again in No.4 Test House and we have already run approximately six hours. As… | ||
| Scan073 | 'F' cylinder tests investigating oil consumption with scraper rings positioned at the top of the piston skirt. | ||
| View original record | To R. From Hs/ACL. c. to SS. WOP. c. to Rg. E. c. to BY. ORIGINAL Hs/ACL.1/MJ.1.1.31. X3866. "F" CYLINDER TESTS - OIL CONSUMPTION WITH SCRAPER RINGS AT TOP OF SKIRT. A previous test was made with the… | ||
| Scan074 | Complaints from the U.S. market for 25 HP & Phantom II cars, focusing on service costs, overheating radiators, and coil failures. | ||
| View original record | To R. From Hs c. to SE. c. to Wor. Handwritten note: Hs tho realistic, capable of accepting a very criticism ORIGINAL x7773 x7941. 25 HP. & P.II CARS IN U.S.A. When we produce cars for U.S.A. we have… | ||
| Scan075 | Customer feedback and criticisms of the 25-EX model, comparing it to the Phantom I and discussing luggage and dynamo issues. | ||
| View original record | -2- Hs.2/WJ.2.1.31. Contd. customers. Although the officials who tried 25-EX. appreciated the improved silence and reduced 'fussiness', they pointed out that a lot of improvements which had been… | ||
| Scan076 | Sourcing American Delco generators and investigating their thermostat control technology for a 25 HP car. | ||
| View original record | -3- very, very, bitter against it and I promised Springfield that I would arrange to send out some generators for a 25 HP. car which would give an increased output. The customer in question says that… | ||
| Scan077 | Letter from a law firm discussing US customs and revenue law for importing automobile parts. | ||
| View original record | COPY. MASTERS & LEVETT, CUSTOMS AND REVENUE LAW, NEW YORK. September 9th, 1930. Messrs. Rolls-Royce of America, Inc. Springfield, Mass. Gentlemen, In following out your present idea of importing parts… | ||
| Scan078 | Letter discussing the classification and import duty for nuts, bolts, and washers. | ||
| View original record | -2- hand, paragraph 330 covers nuts, bolts and lock washers of wrought iron or steel, the duty being 6/10 of 1¢ per pound. When these articles are imported, your broker when he makes entry at the… | ||
| Scan079 | Technical memo detailing tests and issues with an aero engine boost regulator. | ||
| View original record | To R. from Hs/ACL. c. to SG.. WOY. c. to RG. E. c. to LR. Hs/ACL.2/MJ.3.1.31. [Stamped] ORIGINAL [Handwritten] K4033 AERO ENGINE BOOST REGULATOR. Tests with the differential boost regulator are… | ||
| Scan080 | Operating piston guide sleeve seizure due to dust/grit and the need to reduce friction in the apparatus. | ||
| View original record | -2- We have had considerable trouble with the guide sleeve of the operating piston siezing in the alum casing due to the entry of dust and grit. In service the engines frequently operate in clouds of… | ||
| Scan081 | Performance of a P.2 dynamo output and two-rate charge scheme. | ||
| View original record | To R. from EFC. To Sg. c. RV. E. c. PN. Wor. EFC1/AD3.1.31. X.6084. P.2. DYNAMO OUTPUT AND TWO-RATE CHARGE SCHEME. X.6016. Refs. R2/M23.12.30 and SG.21/E31.12.30. We agree that the suggestion… | ||
| Scan082 | Dynamo output limitations and proposed modifications for improved charging performance. | ||
| View original record | EFC1/AD3.1.31. contd. -2- The particular test on 58-CN has been extremely useful in shewing up the limitations of the system. It is our opinion that it must definitely be taken that the dynamo output… | ||
| Scan083 | Dynamo output limitations and potential solutions including modified armatures and automatic control systems. | ||
| View original record | -3- EFC1/AD3.1.31 contd. We agree with the statement in Sg21/E31.12.30 that with the lower resistance the cutting in point would be at 17 m.p.h. also that the output would be approximately as stated,… | ||
| Scan084 | Investigations into hydraulic damper knocks, comparing horizontal and vertical types for future design. | ||
| View original record | To R. From Hs/Rm. c. SG. Wor. c. Da. E. c. Hy. ORIGINAL Hs/Rm.1/MK.3.1.31. X7520 X5520. HYDRAULIC DAMPERS. We have been taking various indicator diagrams of the hydraulic shock absorbers. Those of… | ||
| Scan085 | Analysis of damper efficiency, air vent restriction, and front axle control systems for 20 HP and Phantom II models. | ||
| View original record | - 2 - efficiency slightly but in the case of the 20 HP. damper the drop is not more than 5% and rather justifies the Americans' view that it does no harm. If it softens the riding it appears that the… | ||
| Scan086 | Analysis of damper performance, steering characteristics, material considerations for casings, and a summary of findings. | ||
| View original record | - 3 - (2) There is a greater pressure velocity increase on these dampers than on any other R.R. damper we have tested. As an example, in Fig.(2) Sheet 2, the static pressure required to give a bell… | ||
| Scan087 | Damper indicator diagrams, customer complaints about hydraulic dampers, and future development plans. | ||
| View original record | - 4 - INDICATOR DIAGRAMS. The figures in the circle represent the ft.lbs. of damping obtained from the damper expressed as a percentage of the ft.lbs. of damping expected from the static ball pin… | ||
| Scan088 | Comparative chart of 30 indicator diagrams for a 20 HP Rear component under various test conditions. | ||
| View original record | SHEET I Col: I Row 1: 20 HP. REAR. 65/75 LB. LOW PRESSURE .025" DIA. AIR VENT. LIFT .010" H.P. VALVE DRILLED .055" DIA. 450 R.P.M. 1" STROKE . 25°C. Graph: 1.23 D", 54.6% Row 2: 20 HP. REAR. 65/75 LB.… | ||
| Scan089 | Blank document with a 'Print Room' stamp from the Derby factory. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 3 JAN 31 DERBY. | ||
| Scan090 | Sheet 2 of performance graphs for P.II. Front Dampers under various test conditions. | ||
| View original record | SHEET 2. P. II. FRONT DAMPERS. 1. S.S. A.C.D. 70/80 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT 3/16". H.P. VALVE. DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. (Graph values: 154 LB/□", 0.80□",… | ||
| Scan091 | The reverse side of a document, blank except for a purple ink stamp. | ||
| View original record | ROLLS-ROYCE LIMITED PRINTED 5 JAN 31 DERBY. | ||
| Scan092 | Test report sheet for a 20 HP rear damper lever, including indicator diagrams and a schematic. | ||
| View original record | SHEET 3 20 HP REAR DAMPER LEVER TESTS 3.12.30 17 G IV DAMPER AS USED FOR INDICATOR DIAGRAMS. OVAL LEVER C B B.A. A C.B. BALL PIN LOAD LBS Y-AXIS: .250, .200, .150, .100, .050 X-AXIS: 20, 40, 60, 80,… | ||
| Scan093 | Received and stamped by the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 3 JAN 31 DERBY. | ||
| Scan094 | Performance graphs for S.S. and Phantom II rear dampers under various test conditions. | ||
| View original record | SHEET 4. P.II REAR DAMPERS Top-Left Graph: S.S. REAR DAMPERS. 80/85 LB. LOW PRESS. PRESS. PIPE ATTACHED TO L.P. REFILL VALVE. 450 R.P.M. 1" STROKE. TEMP. 25°C. AREA = 1.59 □" Y-Axis: 154 LB/□"… | ||
| Scan095 | Series of performance graphs for S.S. Rear Dampers under different test conditions. | ||
| View original record | SHEET 5. P.II REAR DAMPERS Graph 1 (Top Left): S.S. REAR. 80/85 LB. HIGH PRESSURE. .025" DIA. AIR VENT. 70 R.P.M. 4" STROKE. 25°C. REFILL BALL VALVE LIFTS .025" AREA = 3.8□" Graph 2 (Top Middle): S.S.… | ||
| Scan096 | Heavily faded document, likely a carbon copy, with a purple ink stamp in the bottom right corner. | ||
| View original record | The main body of the document is illegible due to fading. Text from the purple stamp: ROLLS PR[...]ED 15 JAN 31 L | ||
| Scan097 | Visit to the Cadillac Motor Co. factory, detailing facilities and engine specifications. | ||
| View original record | To R. From Hs. c. to Sg. c. to Wor. Original HS.2/MJ.5.1.31. x1729 CADILLAC MOTOR CO. When I was at Detroit Oy. made it very easy for me to see all round the Cadillac factory. Most of the buildings… | ||
| Scan098 | Observations on engine mounting, gear ratios, weight reduction, and component design. | ||
| View original record | -2- to rubber mount the engine to get rid of roughness at high speeds. The 45° helps them as regards getting room under the bonnet. It will be seen that the gear ratios are very low with the small… | ||
| Scan099 | Observations on cost-saving measures, production methods, and engineering mistakes in U.S. motor factories. | ||
| View original record | To R. From Hs. c. to Ss. c. to Wor. ORIGINAL Hs.1/U.5.1.31. X-772 U.S.A. MOTOR FACTORIES. When visiting U.S.A. factories it is interesting to note how everyone talks costs. If one is talking to the… | ||
| Scan100 | Competitor analysis on shock absorbers, steering, and suspension systems from American manufacturers. | ||
| View original record | -2- It is the quantities which allow them to carry out original things on production. Although our small production does not enable us to make use of a lot of their methods, I think we have got to… | ||
| Scan101 | Technical memorandum discussing cold weather starting and idling issues in supercharged engines, specifically concerning petrol accumulation and potential solutions. | ||
| View original record | To R. From Hs/LoV. c.c. to SS. c.c. to RS. c.c. to Lr. ORIGINAL x3953 x4550 SUPERCHARGED ENGINES - CARBURETTION. During cold weather conditions we frequently get trouble with petrol accumulation in… | ||
| Scan102 | Schematic for a slow running carburettor on an induction pipe. | ||
| View original record | SLOW RUNNING CARB. ON INDUCTION PIPE. INDUCTION PIPE. SMALL CHOKE & THROTTLE DIFFUSER. THIS UNIT COULD BE TRANSFERRED TO LOWER END. MAIN THROTTLE & SMALL SLOW RUNNING THROTTLE WOULD BE COUPLED… | ||
| Scan103 | Installation tests and modifications report for a production Hawker Hart header tank. | ||
| View original record | To R. at LaGanndel. c. to Sg. Wor. c. to Rg. E. c. to Lr. ----------------- ORIGINAL. X4509 Hawkers. Hs/TAG1/ME.7.1.31. ----------------- INSTALLATION TESTS. PRODUCTION HAWKER HART HEADER… | ||
| Scan104 | Modifications made to a tank to prevent water surging and spilling. | ||
| View original record | - 2 - MODIFICATIONS TO TANK. The tank as received from Hawkers is shown in Fig.1. on the sketches attached herewith. Connecting to the engine top water rails is a horned pipe which leads into a common… | ||
| Scan105 | Tests conducted on tank vent positioning and design for 'Fury' and 'Hart' aircraft tanks. | ||
| View original record | - 3 - TANK VENT. Regarding the vent. The position originally was on the centre of the tank top and in our experiments it was moved as far forward as possible Fig.11. which would be the highest point… | ||
| Scan106 | Water 'building up' in cylinder jackets due to steam formation and proposed modifications. | ||
| View original record | - 4 - BUILDING UP. The "building up" is caused through steam formation in the cylinder jackets. The extent of the "building up" under normal running conditions (i.e. engine tilted at 15°, starting up,… | ||
| Scan107 | Installation tests and modifications to a Hawker Hart header tank to prevent water loss under severe conditions. | ||
| View original record | INSTALLATION TESTS. MODIFICATIONS TO HAWKER HART HEADER TANK TO PREVENT WATER LOSS, UNDER THE MOST SEVERE CONDITIONS. SKETCHES SHOW STAGES AS REFERRED TO IN THE REPORT. FIG I HAWKERS DESIGN. BAFFLES… | ||
| Scan108 | Stamped page from the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 7 JAN 31 DE. | ||
| Scan109 | Comparison of Hart and Fury header tank shapes and their effect on water flow and turbulence. | ||
| View original record | INSTALLATION TESTS COMPARING HART & FURY HEADER TANK SHAPES & THE RESULTANT EFFECT ON THE WATER FLOW WHEN USING SIMILAR INTERNAL OUTLET ARRANGEMENTS FOR THE WATER. WITH THE STRAIGHT BACKED, SHALLOW… | ||
| Scan110 | Graph showing the quantity of water displaced by steam formation in the cylinder blocks during engine tests. | ||
| View original record | INSTALLATION TESTS HART HEADER TANK. CURVE SHOWING QUANTITY OF WATER DISPLACED BY FORMATION OF STEAM IN THE CYL. BLOCKS. ENGINE TILTED 15°, RUN AT 1000 R.P.M. UNTIL WATER TEMP. GO THEN AT FULL… | ||
| Scan111 | Largely illegible or blank document with a 'Print Room' date stamp in the bottom right corner. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 8 JAN 31 | ||
| Scan112 | Twin-cylinder shock absorber produced by the Delco Co. and its use on the Cadillac. | ||
| View original record | To R. From Hs. c. to SC. Bor. c. to Ev. W. c. to DA. HYDRAULIC DAMPERS. The Delco Co. have produced a twin cylinder shock absorber in many ways similar to the one we are about to produce. I have asked… | ||
| Scan113 | Flywheel vibrations on the 40/50 engine. | ||
| View original record | To R. From Hs/Gry. c.c. to SS. c.c. to Nor. c.c. to E. c.c. to BY. x6341 FLYWHEEL VIBRATIONS ON 40/50. We have now arranged our optical apparatus for measuring flywheel vibrations for the 40/50… | ||
| Scan114 | Comparative study of three spray patterns labelled 2050, 2500, and 2950. | ||
| View original record | SS 15 2050 2500 2950 | ||
| Scan115 | Diagram illustrating the bending moment on a 1st motion shaft caused by flywheel tilt for a 25 HP engine. | ||
| View original record | IF THE FLYWHEEL TILTS AXIALLY TO THE 1ST MOTION SHAFT WILL BEND DUE TO A SAGGING BENDING MOMENT THE END COUPLES BEING PROVIDED BY THE BALL RACES. FLYWHEEL 25 HP. | ||
| Scan116 | Blank document with a 'PRINT ROOM, DERBY' stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 7 JAN 31 DERBY. | ||
| Scan117 | Photographic study of a phenomenon at different rotational speeds. | ||
| View original record | IV G 8 STATIONARY 2500 2600 2800 3200-h | ||
| Scan118 | Photographic record of five samples showing the progressive distortion of a circular pattern at different numerical stages. | ||
| View original record | VGVI 500 1100 2600 3100 4500 | ||
| Scan119 | Diagram showing an optical measurement setup for flywheel vibrations. | ||
| View original record | OPTICAL MEASUREMENT OF FLYWHEEL VIBRATIONS 10" FOCUS LENS POINT SOURCE OF LIGHT WITH .025" APERTURE MIRROR TO RUN MOST IN TRUTH AT 1000 RPM 54.5" FROM MIRROR 1/100" DEFLECTION ON SCREEN = 0.917 x… | ||
| Scan120 | Proposal to apply a simplified, electrically direct starter scheme to the 20/25 chassis, referencing previous notes. | ||
| View original record | ORIGINAL. To R. from EFC. C. E. EFC8/AD8.1.31. X.6091. SEQUENCE STARTER FOR 20/25 CHASSIS. From time to time suggestions have been made of the use of a simplified sequence starter for the 20 HP. In… | ||
| Scan121 | Investigation into various interior heating systems for cars used in the U.S.A., with a focus on a Packard system. | ||
| View original record | To R. From Hs. c. to SS. Wor. c. to E. Da. c. to By. ORIGINAL X4300, INTERIOR HEATING OF CARS. When I was at Springfield I received a cable from Conduit Street asking me to investigate the interior… | ||
| Scan122 | Experiments to test and measure battery box vibrations on a Phantom II chassis. | ||
| View original record | To R. From Hs/Gry. c. to SS. Wor. c. to Da. E. c. to Ry. ORIGINAL x634 x7535. BATTERY BOX VIBRATIONS ON P.II. In order to verify that the battery on the 40/50 undergoes more movement when supported at… | ||
| Scan123 | Blueprint diagram showing the setup for measuring battery vibrations. | ||
| View original record | [ "CANTILEVER", "Hs 303", "Hs 302", "STEAM INDICATOR", "BATTERY BOX", "MEASUREMENT OF BATTERY VIBRATIONS" ], | ||
| Scan124 | Reverse side of a document showing a Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 8 JAN 31 DERBY. | ||
| Scan125 | Study showing the movement of a cantilever battery box support at various drum speeds. | ||
| View original record | SHEET I CANTILEVER BATTERY BOX SUPPORT MOVEMENT OF EXTREMITY OF BATTERY BOX SUPPORT RELATIVE TO THE FRAME CROSS MEMBER AT THE REAR OF THE FRAME. THE ACTUAL MOVEMENT SHOWN IS CANTILEVER SUPPORT… | ||
| Scan126 | Vibration measurements for a continuous battery box support at different speeds, identifying critical axle speed tramping. | ||
| View original record | 14.99 SHEET II CONTINUOUS BATTERY BOX SUPPORT MEASUREMENTS AS IN SHEET I 14.99 M.P.H 18.45 M.P.H 25.83 M.P.H 30 M.P.H CRITICAL AXLE SPEED TRAMPING | ||
| Scan127 | Explaining the new output curves for the Phantom II 45 Coil Dynamos. | ||
| View original record | To R. from EFC. c. Sg. c. E. By. c. Wor. PN. X.6004. X.6006. PHANTOM II 45 COIL DYNAMOS OF MEDIUM AND HIGH OUTPUT. We attach two blue print sets of curves for 40/50 dynamo output labelled 1 and 2.… | ||
| Scan128 | Analysis of dynamo coil performance, comparing output curves and magnetic circuit modifications. | ||
| View original record | -2- EPC3/AD8.1.31 contd. The curves on sheet 1. represent progressive stages from early cutting in with low output to late cutting in with high output. I. Being for the standard 56 coil dynamo. II.… | ||
| Scan129 | Page discussing the volt-ampere curve for a 12-volt P & R battery and considerations for an armature experiment. | ||
| View original record | EFC3/AD9.1.31 contd. -3- a volt-ampere curve of a fully charged 12-volt P & R battery subjected to various values of charging current. It should be stated that the points on this curve can be repeated… | ||
| Scan130 | Experience with 'Diamond' engine mountings and torque reaction dampers on 20/25 and 25 HP engines. | ||
| View original record | ORIGINAL. To R. From Hs/Rn. c. to Sg. Wor. c. to Ds. E. c. to Ey. Hs/Rn.6/MJ.12.1.31. ENGINE ROOMS & TORQUE REACTION. X.7005. X.5005. We have now had experience of the 'Diamond' engine mounting on… | ||
| Scan131 | Tests on the 25 HP model's clutch pedal travel and flywheel strength. | ||
| View original record | ORIGINAL To R. From Hs/Gry. c.c. to Sg. Wor. c.c. to Ds. E. c.c. to Hy. Ha/Gry.2/MJ.12.1.31. x634. x5300. 25 HP. Lost Movement in Clutch Pedal Travel We have carried out tests on a standard flywheel… | ||
| Scan132 | Graph comparing load versus deflection for a standard and a lightened 25 HP clutch. | ||
| View original record | LOST MOVEMENT 25 HP CLUTCH ANGULAR MOVEMENT OF CLUTCH OPERATING SHAFT WITH CLUTCH SPRINGS CHOC O' BLOCK DEFLECTION IN 1000'S AT 3.62" RAD. LOAD IN LBS. AT 3.2" RAD. STANDARD 25 HP CLUTCH G.33692… | ||
| Scan133 | Very faint and mostly illegible document with bleed-through text from the reverse side, marked with a Print Room stamp. | ||
| View original record | Faint bleed-through text from reverse: Movement of Cylinder Block Stamp: ROLLS-ROYCE, LIMITED PRINT ROOM 14 JAN 31 DERBY. | ||
| Scan134 | Road and bench tests of Delco adjustable hydraulic dampers, detailing the adjustment mechanism and its effects. | ||
| View original record | ORIGINAL To R. From Hs/Rm. c. to Sg. Wor. c. to Da. E. c. to By. Hs/Rm.1/KT.14.1.31. DELCO ADJUSTABLE HYDRAULICS. X832. We have now received the complete set of these dampers that Hs. obtained in… | ||
| Scan135 | Damper loadings, valve silence, and road test performance. | ||
| View original record | -2- Taking into consideration the simplicity of the adjustment it cannot be said that the whole result is unsatisfactory. In fact they appear to have attained a very good compromise. Loadings. The… | ||
| Scan136 | Two graphs showing the variation in maximum ball pin load versus axle velocity for a Delco adjustable damper. | ||
| View original record | DELCO ADJUSTABLE DAMPER VARIATION IN MAX. BALL PIN LOAD AVAILABLE, USING ADJUSTMENT. Left Graph: Nº1 LEAK. THE SMALLEST MAX. BALL PIN LOAD. LBS. 400 300 200 100 LARGE BALL PIN STROKES 4" AXLE VEL.… | ||
| Scan137 | The reverse of a document or photograph with a date stamp. | ||
| View original record | ROLLS-ROYCE, L... PRINT R... 14 FEB 31 | ||
| Scan138 | Graphs showing high and low pressure tests for a Delco rear damper with a 12' lever and adjustable leak. | ||
| View original record | SHT 9 DELCO REAR DAMPER - ADJUSTABLE LEAK. 12" LEVER. Chart 1 (Top Left): DELCO II. HIGH PRESSURE. 4" STROKE. N°1 LEAK. 70 R.P.M 50 R.P.M 25 R.P.M Y-Axis: 462 LB/D" MAX. PRESSURES 1085 LBS/D" 925 "… | ||
| Scan139 | Performance charts for a Delco II adjustable rear damper under different leak and pressure settings. | ||
| View original record | SET 3 DELCO REAR DAMPER. ADJUSTABLE LEAK 12" LEVER. Top-Left Chart: DELCO II LOW PRESSURE 1" STROKE. N°1 LEAK. MAX PRESSURES. 550 R.P.M. --- 115 LB/D" 450 R.P.M. --- 115 " 300 R.P.M. --- 92.5 " 200… | ||
| Scan140 | Diagram illustrating the eccentricity of valve passages for a 'Delco II' model, viewed from the high-pressure end. | ||
| View original record | SAT 4 1/2" MARGIN ¢ MAIN SHAFT 50° 25° CYLINDER & BORE LOW PRESSURE PASSAGE LARGE HOLE .282" DIA SMALL " .250" " HIGH PRESSURE PASSAGE DIAGRAM OF ECCENTRICITY OF VALVE PASSAGES. VIEWED FROM HIGH… | ||
| Scan141 | Cross-section drawing for a Delco II leak adjustment shaft. | ||
| View original record | SHT 5 4/7-1-31 1.900 .750 .375 .437 .685 DIA .312 DIA 1.500 22 ADJUSTMENT GROOVES. 39° .243 DIA .311 DIA 24 T.P.I LOW PRESSURE PASSAGE HIGH " .093 DIA .250 DIA 1 1/4" MARGIN DELCO II. LEAK ADJUSTMENT.… | ||
| Scan142 | Correcting a misunderstanding about the number of coils in a medium output dynamo. | ||
| View original record | To H. from EFC. c. R. Sg. c. Nor. PN. c. Hy. HS. ORIGINAL RECEIVED 04 JAN 1931 SE EFC/AM.4.1.31. X.6004. 48 COIL MEDIUM OUTPUT DYNAMO. Referring to your E1/MO.1.31. you have evidently been under a… | ||
| Scan143 | 'Two Charge Scheme' involving modifications to the dynamo, switchbox, and lighting system. | ||
| View original record | R: from E. C: Sg. Wor. PN. C: Dy. Hs. EFC. E1/MO.1.31. TWO CHARGE SCHEME. Before leaving Derby we arranged by mutual agreement with Works, for Sg's car to be rigged up with what we thought was the… | ||
| Scan144 | Dynamo safety, resistance, and the use of 48-watt headlamp bulbs. | ||
| View original record | -2- E1/M0.1.31 contd. As regards item (3) the 6" resistance is regarded as being the minimum permissible from the point of view of the safety of the dynamo when charging with no load on except the… | ||
| Scan145 | Proposal to standardise a metal tool box on imported Phantom II cars, addressing unsatisfactory current tool storage methods. | ||
| View original record | To R. From Hs. c. to Sg. Or. c. to By. E. c. to Da. Da/EV. x7580. TOOL BOXES. R.R.A.I. are proposing to fit on to all the imported Phantom II cars a tool box in the frame. In their case the whole of… | ||
| Scan146 | Examination of engine back-running during hand starting, focusing on magneto ignition timing. | ||
| View original record | To R. from EFC. c. Sg. Wor. c. Ds. H. c. Dy. Hs. c. Hs/AJL. ORIGINAL RECEIVED JAN 1930 EFC2/AD16.1.31. X.699. STARTING F.2. ENGINE BY HAND ON MAGNETO IGNITION. X.7791. X.6098. With reference to the… | ||
| Scan147 | Magneto timing issues causing backward running and potential cures for EW6 type magnetos. | ||
| View original record | -2- EFC2/ADL6.1.31 contd. In regard to firing the right cylinder to produce backward running, it may be remembered that as long ago as 1919 we produced a model contact breaker and distributor upon… | ||
| Scan148 | Detonation issues in supercharged aero engines during take-off and proposing tests. | ||
| View original record | ORIGINAL. To R. From Hs/Lov. Hs/Lov.3/KT.16.1.31. c. to Wor. Rg. c. to R. Hy. SUPERCHARGED AERO ENGINES. DETONATION. X4550 The "take off" performance of our supercharged engines is limited by the… | ||
| Scan149 | Type test report on an F.27 engine with a 6/1 compression ratio, detailing new camshaft performance, detonation, and fuel economy. | ||
| View original record | To R. From Hs/Lov. C. to Mr. Wor. Cc. to ERg. Hy. Hs/Lov.5/RT.16.1.32. X3196. X4003. P.MS.No39. TYPE TEST WITH 6/1 COMPRESSION RATIO. We have completed preliminary tests on F.27. with the new… | ||
| Scan150 | Modifications to dynamo armatures to increase current output at high speeds. | ||
| View original record | To R. from EFC. c. Sg. c. Wor. E. c. PN. Da. Hs. [STAMP: RECEIVED 24 JAN 1931] [STAMP: ORIGINAL] X.6084. EFC3/AD1 9.1.31. DYNAMO OUTPUT. R3/M6.1.31. To obtain more current at high speeds without too… | ||
| Scan151 | Survey and comparison of different dynamo-battery electrical systems, including those from Bosch, Bijur, and Westinghouse. | ||
| View original record | -2- EFC3/ADL9.1.31 contd. upon being connected to a battery. The phenomenon exists only, of course, when the speed is high enough for such control to take effect. At the speeds below the peak output… | ||
| Scan152 | Modifications to external regulator controls for dynamo battery systems, comparing different regulation methods. | ||
| View original record | -3- It may be considered that it is for this reason that there have been from time to time proposed, modifications of external regulator control in which the regulating action does not take place on… | ||
| Scan153 | Comparison of the relative heating of shunt wound and inherently battery controlled dynamos. | ||
| View original record | EFC3/ADL9.1.31 contd. -4- As regards the relative heating of shunt wound and inherently battery controlled dynamos, though the shunt wound machine undoubtedly scores in output for a given heating when… | ||
| Scan154 | Standardisation and recommendation of headlamp bulbs for the Phantom II and 20/25 models. | ||
| View original record | [STAMP] ORIGINAL [STAMP] RECEIVED 19 JAN 1931 [HANDWRITTEN] A To R. from EFC. C. Sg. C. WOT. C. Hy. [HANDWRITTEN CIRCLED] HS EFC2/ADS.9.1.31. X.6089 CHASSIS LAMP BULBS X.6083 1/Msl.1.31. As stated by… | ||
| Scan155 | List of recommended standard lamp bulbs for the Phantom II chassis. | ||
| View original record | 15.1.31. LIST OF LAMP BULBS RECOMMENDED FOR STANDARD ON PHANTOM II CHASSIS. 1. Headlamp bulbs. 12/14 v. 48 w. gasfilled, centre contact S.B.C. cap. (Osram No. S.7014). 2. Central lamp bulb. 12/14 v.… | ||
| Scan156 | List of standard recommended lamp bulbs for the 20/25 chassis. | ||
| View original record | 15.1.31. LIST OF LAMP BULBS RECOMMENDED FOR STANDARD ON 20/25 CHASSIS. 1. Headlamp bulbs. 12/14 v. 36 w. gasfilled, centre contact S.B.C. cap, BAS. 4 S. (Osram No. S.7012) 2. Central lamp bulb. 12/14… | ||
| Scan157 | Crankcase distortion tests conducted on a 25 HP engine. | ||
| View original record | To R. From Hs/Gry. c. to SG. Wor. c. to AG. K. c. to Dn. Hy. x5000 25.HP. CRANKCASE DISTORTION. We have carried out tests on a 25.HP. crankcase (bottom half absent) to measure deflections both in a… | ||
| Scan158 | Diagram of an inverted 25 HP crankcase top half, showing an indicator clock on the centre main bearing. | ||
| View original record | SUPPORT INDICATOR CLOCK ON CENTRE MAIN BEARING. SUPPORT. CRANKCASE 25 H.P. (INVERTED TOP HALF) | ||
| Scan159 | The reverse side of a technical drawing with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 JAN 31 DERBY. | ||
| Scan160 | Graph showing crankcase deflections under various load conditions for a 25 HP engine. | ||
| View original record | 25 H.P. CRANKCASE DEFLECTIONS CRANKCASE SUPPORTED BY TWO END MAIN BEARINGS, LOAD APPLIED TO CENTRE MAIN BEARING. Y-AXIS: DEFLECTION IN INCHES VALUES: .001, 2, 3, 4, 5, 6, 7, 8, 9, .010, 11 X-AXIS:… | ||
| Scan161 | Cover sheet with a 'Print Room, Derby' date stamp. | ||
| View original record | ROLLS-ROYCE, LTD. PRINT ROOM 20 JAN 37 DERBY. | ||
| Scan162 | Standardisation of a reduction gear to LOP E.35711, with new strengthened casings, a driving shaft with tighter serrations, and hardened roller races with reduced clearances. | ||
| View original record | R.R. 756 (10H) (D.G. 114. 8-5-29). J.H., LTD. ORIGINAL - COMPLETED 22.1.31. STANDARDISATION OF AERO ENGINE PARTS Date 30.6.30. Description of Parts. REDUCTION GEAR TO LOP. E.35711. New strengthened… | ||
| Scan163 | Explaining the attached blueprint curves for the 20/25 dynamo, detailing the methodology for temperature rise settings. | ||
| View original record | To R. from EFC. c. Sg. c. E. Ev. c. Wor. PN. EP. EFC4/AD26.1.31. X.5661 X.5663 20/25 56 AND 48 COIL DYNAMOSOF VARIOUS OUTPUTS. X.6005. We now attach a blue print set of curves for 20/25 dynamo… | ||
| Scan164 | Comparison of performance curves for various dynamo modifications, including different coil counts and pole piece designs. | ||
| View original record | -2- EFC4/AD26.1.31 contd. Curves I and II correspond exactly with curves I and III on 1. in the 40/50 case. Curve III however, is for a dynamo otherwise similar to I but with the pole piece… | ||
| Scan165 | The operation of the Lucas dynamo. | ||
| View original record | EFC4/AD26.1.31 contd. -3- A report on the operation of the Lucas dynamo including both our observations on the matter with which E. has provided us and also a report upon the operation of the dynamo… | ||
| Scan166 | Graph showing output speed performance curves for three different 20/25 Dynamos at a constant operating voltage. | ||
| View original record | N S A 20 / 25 I AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 X.5661. X.5663. X.6005 OUTPUT SPEED PERFORMANCE CURVES OF 20/25 DYNAMOS I 56 COIL STANDARD MACHINE (58 C° SETTING.) 8° 123.5° II 48… | ||
| Scan167 | Heavily faded document, likely a carbon copy, with almost completely illegible text and a purple ink stamp. | ||
| View original record | ROLLS-ROYCE, LTD PRINT ROOM, 26 JAN 31 DERBY. | ||
| Scan168 | Installation tests concerning air space and the formation of steam pockets in 'F' engine cylinder jackets. | ||
| View original record | To. R. Sg. Wor. Rg. E. By. lp. ORIGINAL Hs/TAG.1/WE.27.1.31. X4509. INSTALLATION TESTS. AIR SPACE AND FORMATION OF STEAM POCKETS IN 'F' ENGINE CYLINDER JACKETS. Steam pockets form in "F" engine… | ||
| Scan169 | Tests on engine cooling systems, focusing on header tank design, water flow, and steam formation. | ||
| View original record | - 2 - (e) That even when the header tank is so arranged that the cylinder jackets are full before starting, there is a displacement takes place with the rise in temperature indicating a poor water… | ||
| Scan170 | Water system filling procedures and tests conducted at various engine inclinations for aircraft. | ||
| View original record | - 3 - The range of curves are 7 1/2º, 15º & 20º inclination. Although 15º is the average angle of machines when at rest (i.e. of the Fighter and light Bomber class) an extreme angle of 20º was taken… | ||
| Scan171 | Engine cooling system tests, detailing tank capacities, water levels, and the influence of tank position on performance. | ||
| View original record | - 4 - The capacities of the tank are viz:- Total capacity = 5.1 gallons. Water required in tank for the cold filling level = 2.5 galls. Air space (in tank) = 2.6 gallons. The air space in the cylinder… | ||
| Scan172 | Analysis of steam pocket formation and air trapping in engine cylinder jackets under various operating conditions. | ||
| View original record | - 5 - water commencing to build up in the tank. This we think is aggravated by all the air not being driven out of the jackets when the engine is started. In Curve (2) of 211F. the tank was mounted in… | ||
| Scan173 | Report page discussing engine cooling system considerations, including tank position, header tanks, and steam pocket formation. | ||
| View original record | - 6 - (2) The tank position relative to the cylinder jackets when tilted is very important due to the fact that it governs the air space in the jackets on filling the system to its normal level and… | ||
| Scan174 | Graph showing cylinder water level and airspace tests for F'S & H/S engines at various angles of inclination. | ||
| View original record | INSTALLATION TESTS. CURVE 199F CYLINDER WATER LEVEL & AIRSPACE. (F'S & H/S ENGINES) TESTS. INSTALLATION TESTS:- TO DETERMINE THE STATIC WATER LEVEL & AIR SPACE IN THE F'S ENGINE FOR VARIOUS ANGLES OF… | ||
| Scan175 | Blank document page with a receiving stamp from Derby. | ||
| View original record | LIMITED ROOM, 16 JAN 31 DERBY. | ||
| Scan176 | Graph determining the air space in cylinder blocks based on header tank height and engine tilt for F.S. F. M/S engines. | ||
| View original record | INSTALLATION TESTS. CURVE 200F AIR SPACE IN CYLINDERS. F.S. F. M/S ENGINES. TO DETERMINE THE AIR SPACE IN CYLINDER BLOCKS FOR WHEN THE HEADER TANK IS AT VARIOUS HEIGHTS ABOVE CRANKSHAFT CENTRE LINE &… | ||
| Scan177 | Blank document page with a Print Room date stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 16 JAN 31 DERBY. | ||
| Scan178 | Graph from an installation test showing water displacement by steam in a Hart Header Tank. | ||
| View original record | INSTALLATION TESTS. HART HEADER TANK CURVE SHOWING QUANTITY OF WATER DISPLACED BY FORMATION OF STEAM IN THE CYL. BLOCKS. ENGINE TILTED 15º. RUN AT 1000RPM UNTIL WATER TEMP 60ºC THEN AT FULL THROTTLE… | ||
| Scan179 | Stamped document backing sheet. | ||
| View original record | ...CE, LIMITED ...T ROOM, 10 JAN 31 DERBY. | ||
| Scan180 | Graph showing the quantity of water displaced by steam formation in the cylinder jackets of a Hart Header Tank under two test conditions. | ||
| View original record | INSTALLATION TESTS. HART HEADER TANK. CURVE SHOWING QUANTITY OF WATER DISPLACED BY FORMATION OF STEAM IN THE CYL JACKETS WHEN ① TANK IS MOUNTED AS IN THE MACHINE & THERE BEING .85 GALLS AIR SPACE IN… | ||
| Scan181 | Blank page with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 16 JAN 31 DERBY. | ||
| Scan182 | Graph from installation tests showing the effect of airspace in cylinder jackets on water displaced. | ||
| View original record | INSTALLATION TESTS EFFECT OF AIRSPACE IN CYL JACKETS ON WATER DISPLACED GALLS TEMP °C TAKEN AT HEADER TANK STATIC LEVEL FURY TANK FURY HART STATIC LEVEL HART TANK TAG 5-1-31 CURVE 2/2F | ||
| Scan183 | Graph from installation tests on a Fury Tank showing the effect of RPM on water displaced during the warming-up period. | ||
| View original record | INSTALLATION TESTS FURY TANK LOW POSITION RELATIVE TO CYL BLOCKS EFFECT OF RPM ON WATER DISPLACED, WARMING UP PERIOD CURVE ① WARMING UP @ 1000 RPM (LOW PUMP SPEED) CURVE ② " " @ 1500 " STATIC LEVEL… | ||
| Scan184 | Diagram illustrating installation tests for filling an aircraft's water system on uneven ground to manage air space in cylinder jackets. | ||
| View original record | INSTALLATION TESTS FILLING WATER SYSTEM IN MACHINES ON UNEVEN GROUND TO THE BEST ADVANTAGE. I.E. LEAVING THE MINIMUM AIR SPACE IN THE CYLINDER JACKETS. 1) MACHINE ON LEVEL GROUND. NORMAL ANGLE OF TILT… | ||
| Scan185 | Sketch of the apparatus and method for obtaining data on airspace in engine cylinder jackets when inclined at different angles. | ||
| View original record | INSTALLATION TESTS. SKETCH OF APPARATUS & METHOD EMPLOYED IN OBTAINING DATA ON AIRSPACE IN ENGINE CYLINDER JACKETS WHEN ENGINE IS INCLINED AT DIFFERENT ANGLES. VENT COCK GAUGE GLASS (B) VENT FILLER… | ||
| Scan186 | The temperature rise settings for Phantom II medium and high output dynamos. | ||
| View original record | To R. from EFC. c. Sg. c. E. Ev. c. Wor. PN. X.6004. X.6005. PHANTOM II 48 COIL DYNAMOS OF MEDIUM AND HIGH OUTPUT. Further to our EFC3/AD9.1.31, the remarks concerning temperature rise settings of… | ||
| Scan187 | Inertia torque and local out-of-balance as causes of engine roughness. | ||
| View original record | To R. From Hs/ c. to SG. c. to Rg. c. to RY. /Tsm. Gry.1/MJ.27.1.31. INERTIA TORQUE. In previous reports we have stated that roughness in a six cylinder engine must be due to inertia torque and that… | ||
| Scan188 | The causes and investigation of failures in Entex ignition coils. | ||
| View original record | To-R. from EPC. [STAMP: RECEIVED 29 MAY 1931] ORIGINAL EPCl/AD28.1.31. ENTEX IGNITION COILS. Your EL/415.1.31. Coil failures of the type that have principally occurred recently are not, we consider,… | ||
| Scan189 | Analysis of magnetic circuit design for energy storage, comparing closed versus open circuits and the impact of core size and windings. | ||
| View original record | -2- RFC3/AD28.1.31 contd. energy has to be supplied and stored in a form in which it is again available, would render the use of a completely closed magnetic circuit out of the question owing to the… | ||
| Scan190 | Ignition coil winding insulation materials, wire quality, and performance issues related to spark plug gaps. | ||
| View original record | -3- EFC1/AD28.1.31 contd. The layers of winding used to be normally insulated with oil varnished paper though some improvement has been provided by using paraffin wax paper of similar thickness and… | ||
| Scan191 | The experimental production and voltage testing of ignition coils, discussing their performance and durability. | ||
| View original record | LFC1/AD28.1.31 contd. -4- We have produced experimentally, a coil with a larger number of secondary turns but on voltage test have not realised the proportional increase of voltage which was… | ||
| Scan192 | Ignition coil testing, including impregnation, voltage, insulation, and comparison with American coils. | ||
| View original record | -5- With regard to the provision on the coil of some limit of voltage in the form of a safety gap, this is already intended to be provided in the distributor which is at no great distance from the… | ||
| Scan193 | Tests and construction of Delco Lovejoy hydraulic dampers. | ||
| View original record | To R. From Hs/Rn. c. to Sg. Wor. c. to Da. E. c. to By. ORIGINAL Ha/Rn.2/MJ.30.1.31. X832 X255 DELCO HYDRAULIC DAMPERS. We have been carrying out tests on one of the latest type Delco Lovejoy dampers… | ||
| Scan194 | Report analyzing the design and function of a damper, focusing on venting, filtering, and valves. | ||
| View original record | -2- (3) Venting. They allow an appreciable leak past the screw holding the two piston halves together, we have to confirm if this has any effect on the damper performance, it may be an additional… | ||
| Scan195 | Technical analysis of spring, damper, and valve performance in a vehicle's suspension system. | ||
| View original record | -3- up to about 3 ft/sec. on the rear axle of a spring controlled passage in the shape of an annular leak of length .100 and various areas depending on the number of the valves fitted. Actually for… | ||
| Scan196 | Report page discussing damper levers, patent situations, road tests, and piston dampers. | ||
| View original record | - 4 - blocking up the leaks being shewn on Sheet 3 where double the maximum pressure is reached in the same time with no more damping. SHORT DAMPER LEVERS. There appears to be little doubt that these… | ||
| Scan197 | Weight comparison table for Lovejoy and 20 HP rear shock damper components. | ||
| View original record | SHOCK DAMPER WEIGHTS. Lovejoy & 20 HP. Rear. DETAILS WEIGHTS. | LOVEJOY, | 20 HP. REAR Cylinder only. | 7 lbs. 10 ozs. | 2 lbs. 12 ozs Cylinder only, complete with end cover, top cover, valves, etc. |… | ||
| Scan198 | Graphs comparing bending and torsion deflection under load for various hydraulic damper levers and arms. | ||
| View original record | SHEET I BENDING OF LEVER DEFLECTION MEASURED AT B DEFLECTION MEASURED AT A 1/1000" AT BALL END Y-AXIS: .100, .050, 0 X-AXIS: LOAD ON LEVER LBS., 0, 20, 40, 60, 80, 100, 120 GRAPH LINES: OVAL SECTION… | ||
| Scan199 | Mostly blank document with a purple stamp in the top right corner. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 3 FEB 31 DERBY. | ||
| Scan200 | Set of graphs and data tables showing the variation in Delco loading with axle velocity for rear axle dampers. | ||
| View original record | SHEET 2. REAR AXLE DAMPERS. VARIATION IN DELCO LOADING WITH AXLE VELOCITY. VALVES 3G. G.2. STROKES "Z-4" 12" LEVER 16964 Graph 1 (High Press): 450 R.P.M. 300 R.P.M. 200 R.P.M. 100 R.P.M. 308 LBS/□"… | ||
| Scan201 | Performance graphs and data for front axle dampers with 7.5' levers. | ||
| View original record | FRONT AXLE DAMPERS. 7.5" LEVERS. SHEET 3 COMPRESSION OR LOW PRESSURE STROKE MEAN AXLE VEL. FT/SEC MEAN BALL PIN LOAD LBS MAX. BALL PIN LOAD LBS .75 27.7 29.5 1.07 32.6 32.6 1.50 40 45.6 2.15 44.5 58.6… | ||
| Scan202 | Blueprint showing various performance diagrams for a Delco Damper system. | ||
| View original record | SHEET IV DIAGRAMS DELCO DAMPER. MAIN LEVER 7.5". INTERMEDIATE LEVER 1:350" Top-Left Diagram: "DELCO" LOW PRESSURE. 7.1.31 AS DELIVERED STANDARD LOVEJOY OIL 450 R.P.M. 1" STROKE. AXLE VEL. 1.25 FT/SEC… | ||
| Scan203 | Graph showing the performance variation of a Delco Damper with temperature at high and low pressures. | ||
| View original record | SHEET V VARIATION IN PERFORMANCE WITH TEMPERATURE DELCO DAMPER. AXLE VELOCITY .75 FT/SEC STROKE 4" LOW PRESSURE OIL TEMP 20°C MEAN BALL PIN LOAD 29.2 MAX. BALL PIN LOAD 33.0 LBS. PRESSURE 100 LBS/D"… | ||
| Scan204 | Performance variation graphs and data tables for a Delco Damper at different speeds. | ||
| View original record | SHEET VI VARIATION IN PERFORMANCE WITH SPEED DELCO DAMPER Top Graph & Table: 154 LBS/D" OIL PRESS. BALL PIN VEL | MAX. PRESS | M.E.P. .75 | 33 | 29.4 | A 1.08 | 38.4 | 33 | B 1.50 | 52.5 | 43.8 | C… | ||
| Scan205 | Graph plotting the variation of maximum ball pin load against axle velocity for a 7.5' lever. | ||
| View original record | SHEET VII VARIATION OF BALL PIN LOAD WITH AXLE VELOCITY 7.5" LEVER VALVES 2G. G4 MAXIMUM BALL PIN LOAD 500 400 LONG STROKES HIGH PRESSURE 300 200 SHORT STROKES HIGH PRESSURE 100 LONG & SHORT STROKES… | ||
| Scan206 | Diagram of a Lovejoy Piston with cross-sections and annotations. | ||
| View original record | DIAGRAM LOVEJOY PISTON SHEET 8 7.500 1.350 2.40 REPLENISHING PASSAGE NURLED & PRESSED IN TWO HALVES OF PISTON INTERCHANGE SCREW HEAD LOCKED BY INDENTATIONS NOT PRESSED IN ITS UNDER SIDE ABUTTING ON… | ||
| Scan207 | Blueprint with specifications for an upward/low pressure valve and a high pressure/rebound valve. | ||
| View original record | SHEET 9. UPWARD OR LOW PRESSURE VALVE. ANNULAR CLEARANCE AT A .282 - .243 = .039" SHROUDED VALVE LIFT .125" VALVE LETTER C. OUTER SPRING RATING 238 LBS/IN INNER SPRING RATING 14.8 LBS/IN LIGHT SPRING… | ||
| Scan208 | Blueprint graph and diagram detailing the results of Delco lever deflection tests. | ||
| View original record | [ "Sheet X.", ""DELCO" LEVER DEFLECTION TESTS.", "12" LEVER PISTON STOP AT L.P. END.", "DEFLECTION INS.", ".080", ".060", ".040", ".020", "LOADS ON LEVER. LB.", "20", "40", "60", "80", "100", "120",… | ||
| Scan209 | Heavily faded carbon copy document with a purple ink 'Print Room' date stamp. | ||
| View original record | The main body of text is illegible. Stamped text: ROLLS-ROYCE, LIMITED PRINT ROOM, 3 FEB 31 DERBY. | ||